import math

def lowestTriangle(trianglebase, area):
    return math.ceil((2 * area)/trianglebase)

b, a = map(int, input().split())

height = lowestTriangle(b, a)

print(height)

using namespace std;

string ltrim(const string &);
string rtrim(const string &);
vector<string> split(const string &);

/*
 * Complete the 'lowestTriangle' function below.
 *
 * The function is expected to return an INTEGER.
 * The function accepts following parameters:
 *  1. INTEGER trianglebase
 *  2. INTEGER area
 */

int lowestTriangle(int trianglebase, int area) {
    // Area of a triangle with base: a = (h_b*b)/2
    // find the smallest interger `h` such that there exist a triangle `h` base `b` having an area of at least `a`
    // so (h_b*b)/2 >= a 
    // ==> h_b*b >= 2a
    // ==> h_b >= 2a/b
    // ==> h_b = ceil(2a/b)
    // ceil (x/y) = (x+y-1)/y (https://codeforces.com/blog/entry/78852)
    // ==> h_b = (2a + b -1)/b
    return (2*area+trianglebase-1)/trianglebase;
}

int main()
{
    ofstream fout(getenv("OUTPUT_PATH"));

    string first_multiple_input_temp;
    getline(cin, first_multiple_input_temp);

    vector<string> first_multiple_input = split(rtrim(first_multiple_input_temp));

    int trianglebase = stoi(first_multiple_input[0]);

    int area = stoi(first_multiple_input[1]);

    int height = lowestTriangle(trianglebase, area);

    fout << height << "\n";

    fout.close();

    return 0;
}

string ltrim(const string &str) {
    string s(str);

    s.erase(
        s.begin(),
        find_if(s.begin(), s.end(), not1(ptr_fun<int, int>(isspace)))
    );

    return s;
}

string rtrim(const string &str) {
    string s(str);

    s.erase(
        find_if(s.rbegin(), s.rend(), not1(ptr_fun<int, int>(isspace))).base(),
        s.end()
    );

    return s;
}

vector<string> split(const string &str) {
    vector<string> tokens;

    string::size_type start = 0;
    string::size_type end = 0;

    while ((end = str.find(" ", start)) != string::npos) {
        tokens.push_back(str.substr(start, end - start));

        start = end + 1;
    }

    tokens.push_back(str.substr(start));

    return tokens;
}